Incandescent gas-burner.



No. 733,473. PATENTED JULY 14, 1903. A. FARKAS.

INCANDESGENT GAS BURNER.

urmouxon rum) um. 27, 1903.-

THE NuRms PETERS c0. mam-urns) WAEHWGTON' u c UNITED STATES ARMANDFARKAS,

Patented July 14, 1903.

OF PARIS, FRANCE.

INCANDESCENT GAS-BURNER.

SPECIFICATION forming part of Letters Patent N 0. 733,473, dated July14, 1903.

Application filed January 27, 1903- Serial No. 140,741. (No model.)

To all 1072 0111. it may concern/.- 7

Be it known that I, ARMAND FARKAS, a citizen of the French Republic, anda resident of Paris, France, have invented certain new and usefulImprovements in Incandescent Gas- Burners, of which the following is aspecification.

This invention relates to an incandescent gas-burner adapted to burndownward, in which the overheating of the mixing-tube and the otherparts of the lamp by the ,heated gases of combustion is prevented bysurrounding the Bunsen-burner tube with another tube, so that a layer ofair adapted to insulate heat is placed between the Bunsen tube and theouter tube on which the gases of combustion impinge. The said outer tubecan be provided with ribs or the like adapted to conduct heat outward. 1

One form of this invention is shown in the annexed drawing as anexample.

The burner is a Bunsen burner of the usual construction, except that thenozzle a, with its aperture Z), is at the upper part of the burner andthat the mixing-tube g is directed downwardly. The air-inlet aperturesare at the sides, as usual, and the mixing-chamber c is surrounded inthe known manner by a ring 6, provided with air-apertures d,corresponding with those in the burner, so that the supply of air can becontrolled by adjusting the said ring 6. The Bunsen flame is produced atthe aperture fof the burner and beats a suitably-shaped incandescentbody 1). The aperture of the Bunsen burner can either be situated at theupper end of the incandescent body or can be a considerable distancewithin the latter. In the latter case the flame more thoroughly impingeson the incandescent body, but in the former case an incandescent body ofspecial shape must be used.

The mixing-tube g of the Bunsen burner is surrounded by a jacket 1,which is attached to the burner at j, for instance. By this means anannular chamber is formed between the tube .9 and the said jacket 1',and the said chamber only communicates with the outer air at its lowerend. In order to allow from the first as little heat as possible to betransmitted from the gases of combustion to the mixing-tube in largeburners, the said i jacket '6 is preferably provided with ribs of largesurface area. These ribs can be of any suitable shape and arrangedin anysuitable manner; but they must be good conductors of heat and havesufficient surface area to allow of rapid transmission of heat. Thedrawing represents, merely as an example, a helical metal stripsurrounding the jacket '11.

Below the heating-ribs Z the jacket i is provided with a disk q and asocket on. The latter is provided With claws or the like it for holdingthe ring 0, supporting the incandescent body 19.

The purpose of the arrangement described is obvious. The heat generatedby combustion is first transmitted from the incandescent bodyp to thedisk qand the ribs Z. Owing to the large superficial area of these partsthe heat is radiated from them into the atmosphere without beingtransmitted to the Bunsen burner itself. The direct transmission of heatfrom the gases of combustion to the Bunsen burner is also veryeffectually prevented by the air inclosed in the chamber k. This air isof course considerably rarefied by being heated and forms an excellentheat-insulator.

I declare that what I claim is 1. In an incandescent burner of thecharacter described the combination of a downwardly-directedmixing-tube, a nozzle at the upper end thereof, an incandescent body atthe lower end thereof, and an outer tube surrounding said mixing-tube soas to form an annular chamber closed at the top and adapted to containair, substantially as described, for the purpose set forth.

2. In an incandescent burner of the character described, the combinationof a downwardly-directed mixing-tube, a nozzle at the upper end thereof,an incandescent body at the lower end thereof, an outer tube surroundingsaid mixing-tube so as to form an annular tube closed at the top andadapted to contain air, and outwardly-directed heat-radiatingbodies ofcomparatively large surface area on the exterior of said outer tube,substantially as described for the purpose set forth.

3. In an incandescent burner of the character described, the combinationof a downwardly-directed mixing-tube, a nozzle at the upper end thereof,an incandescent body at the lower end thereof, said mixing-tubeextending within said incandescent body, an outer tube surrounding saidmixing-tube so as to form an annular chamber closed at the top andadapted to contain air, and outwardlydirected heat-radiating bodies, ofcomparatively large surface area, on the exterior of said outer tube,substantially as described for the purpose set forth.

i. The combination, with an inverted mixing-chamber for gas and air, ofan air-chamber surrounding the said mixing-chamber, and a mantlesupported under the said mixing-chamber and receiving from it theinflammable mixture.

5. The combination, with an inverted mixing-chamber for gas and air, ofan air-chamber surrounding the said mixingchamber and providedexternally with heat-radiating bodies, and a mantle supported under themouth of the said mixing-chamber.

6. The combination, with an inverted mixing-chamber for gas and air, andan air-chamber surrounding the said mixing-chamber; of a mantleconnected to the lower part of the said air-chamber and supported by itin an inverted position under the mouth of the said mixing-chamber.

In witness whereof I have signed this specification in the presence oftwo witnesses.

- ARMAND FARKAS.

Witnesses:

ARNOLD HELLER, DRATSCH SIGISMOND.

